a, b = input().split()
flag = 0
if a[0] == "-":
  flag += 1
  a = a.replace("-", "")
if b[0] == "-":
  flag += 1
  b = b.replace("-", "")
if a.count(a[0]) == 1 and a.count("0") == len(a) - 1 and len(a) >= 3 and \
   b.count(b[0]) == 1 and b.count("0") == len(b) - 1 and len(b) >= 3:
   print((-1) ** flag * int(a) * int(b) // 10)
else:
  score = int(a) * int(b)
  if score < 10 ** 8:
    print((-1) ** flag * score)
  else:
    print("E")